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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* component-factory.c
 *
 * Authors: Ettore Perazzoli <ettore@helixcode.com>
 *
 * Copyright (C) 2000  Helix Code, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <bonobo/bonobo-generic-factory.h>
#include <gal/widgets/e-gui-utils.h>

#include "camel.h"

#include "Evolution.h"
#include "evolution-storage.h"

#include "folder-browser-factory.h"
#include "evolution-shell-component.h"
#include "folder-browser.h"
#include "mail.h"       /* YUCK FIXME */
#include "mail-config.h"
#include "mail-tools.h"
#include "mail-ops.h"
#include "mail-offline-handler.h"
#include "mail-local.h"
#include "mail-session.h"
#include "mail-mt.h"
#include "mail-importer.h"
#include "mail-vfolder.h"             /* vfolder_create_storage */

#include "component-factory.h"

#include "mail-summary.h"
#include "mail-send-recv.h"

char *default_drafts_folder_uri;
CamelFolder *drafts_folder = NULL;
char *default_sent_folder_uri;
CamelFolder *sent_folder = NULL;
char *default_outbox_folder_uri;
CamelFolder *outbox_folder = NULL;
char *evolution_dir;

#define COMPONENT_FACTORY_ID "OAFIID:GNOME_Evolution_Mail_ShellComponentFactory"
#define SUMMARY_FACTORY_ID   "OAFIID:GNOME_Evolution_Mail_ExecutiveSummaryComponentFactory"

static BonoboGenericFactory *component_factory = NULL;
static BonoboGenericFactory *summary_factory = NULL;
static GHashTable *storages_hash;

/* EvolutionShellComponent methods and signals.  */

static EvolutionShellComponentResult
create_view (EvolutionShellComponent *shell_component,
         const char *physical_uri,
         const char *folder_type,
         BonoboControl **control_return,
         void *closure)
{
    EvolutionShellClient *shell_client;
    GNOME_Evolution_Shell corba_shell;
    BonoboControl *control;

    shell_client = evolution_shell_component_get_owner (shell_component);
    corba_shell = bonobo_object_corba_objref (BONOBO_OBJECT (shell_client));

    if (g_strcasecmp (folder_type, "mail") == 0) {
        control = folder_browser_factory_new_control (physical_uri,
                                  corba_shell);
    } else if (g_strcasecmp (folder_type, "mailstorage") == 0) {
        CamelService *store;
        EvolutionStorage *storage;

        store = camel_session_get_service (session, physical_uri,
                           CAMEL_PROVIDER_STORE, NULL);
        if (!store)
            return EVOLUTION_SHELL_COMPONENT_NOTFOUND;
        storage = g_hash_table_lookup (storages_hash, store);
        if (!storage) {
            camel_object_unref (CAMEL_OBJECT (store));
            return EVOLUTION_SHELL_COMPONENT_NOTFOUND;
        }

        if (!gtk_object_get_data (GTK_OBJECT (storage), "connected"))
            mail_scan_subfolders (CAMEL_STORE(store), storage);
        camel_object_unref (CAMEL_OBJECT (store));

        control = folder_browser_factory_new_control ("", corba_shell);
    } else if (g_strcasecmp (folder_type, "vtrash") == 0) {
        control = folder_browser_factory_new_control ("vtrash:file:/", corba_shell);
    } else
        return EVOLUTION_SHELL_COMPONENT_UNSUPPORTEDTYPE;

    if (!control)
        return EVOLUTION_SHELL_COMPONENT_NOTFOUND;

    *control_return = control;
    return EVOLUTION_SHELL_COMPONENT_OK;
}

static void
do_create_folder (char *uri, CamelFolder *folder, void *data)
{
    GNOME_Evolution_ShellComponentListener listener = data;
    CORBA_Environment ev;
    GNOME_Evolution_ShellComponentListener_Result result;

    if (folder)
        result = GNOME_Evolution_ShellComponentListener_OK;
    else
        result = GNOME_Evolution_ShellComponentListener_INVALID_URI;

    CORBA_exception_init(&ev);
    GNOME_Evolution_ShellComponentListener_notifyResult(listener, result, &ev);
    CORBA_Object_release(listener, &ev);
    CORBA_exception_free(&ev);
}

static void
create_folder (EvolutionShellComponent *shell_component,
           const char *physical_uri,
           const char *type,
           const GNOME_Evolution_ShellComponentListener listener,
           void *closure)
{
    char *uri;
    CORBA_Environment ev;

    CORBA_exception_init(&ev);
    if (!strcmp (type, "mail")) {
        uri = g_strdup_printf ("mbox://%s", physical_uri);
        mail_create_folder (uri, do_create_folder, CORBA_Object_duplicate (listener, &ev));
        GNOME_Evolution_ShellComponentListener_notifyResult (listener,
                                     GNOME_Evolution_ShellComponentListener_OK, &ev);
                                     
    } else {
        GNOME_Evolution_ShellComponentListener_notifyResult (
            listener, GNOME_Evolution_ShellComponentListener_UNSUPPORTED_TYPE, &ev);
    }
    CORBA_exception_free(&ev);
}

static struct {
    char *name, **uri;
    CamelFolder **folder;
} standard_folders[] = {
    { "Drafts", &default_drafts_folder_uri, &drafts_folder },
    { "Outbox", &default_outbox_folder_uri, &outbox_folder },
    { "Sent", &default_sent_folder_uri, &sent_folder },
};

static void
unref_standard_folders (void)
{
    int i;
    
    for (i = 0; i < sizeof (standard_folders) / sizeof (standard_folders[0]); i++) {
        if (standard_folders[i].folder)
            camel_object_unref (CAMEL_OBJECT (*standard_folders[i].folder));
    }
}

static void
got_folder (char *uri, CamelFolder *folder, void *data)
{
    CamelFolder **fp = data;
    
    if (folder) {
        *fp = folder;
        camel_object_ref (CAMEL_OBJECT (folder));
    }
}

static void
owner_set_cb (EvolutionShellComponent *shell_component,
          EvolutionShellClient *shell_client,
          const char *evolution_homedir,
          gpointer user_data)
{
    GNOME_Evolution_Shell corba_shell;
    const GSList *accounts;
#ifdef ENABLE_NNTP
    const GSList *news;
#endif
    int i;

    g_print ("evolution-mail: Yeeeh! We have an owner!\n"); /* FIXME */

    evolution_dir = g_strdup (evolution_homedir);
    mail_session_init ();
    
    mail_config_init ();
    
    storages_hash = g_hash_table_new (NULL, NULL);
    
    vfolder_create_storage (shell_component);

    corba_shell = bonobo_object_corba_objref (BONOBO_OBJECT (shell_client));
    
    accounts = mail_config_get_accounts ();
    mail_load_storages (corba_shell, accounts, TRUE);
    
#ifdef ENABLE_NNTP
    news = mail_config_get_news ();
    mail_load_storages (corba_shell, news, FALSE);
#endif

    mail_local_storage_startup (shell_client, evolution_dir);
    mail_importer_init (shell_client);
    
    for (i = 0; i < sizeof (standard_folders) / sizeof (standard_folders[0]); i++) {
        *standard_folders[i].uri = g_strdup_printf ("file://%s/local/%s", evolution_dir, standard_folders[i].name);
        mail_msg_wait (mail_get_folder (*standard_folders[i].uri, got_folder, standard_folders[i].folder));
    }
    
    mail_session_enable_interaction (TRUE);
    
    mail_autoreceive_setup ();
}

static void
free_storage (gpointer service, gpointer storage, gpointer data)
{
    camel_service_disconnect (service, TRUE, NULL);
    camel_object_unref (service);
    bonobo_object_unref (storage);
}

static gboolean
idle_quit (gpointer user_data)
{
    if (e_list_length (folder_browser_factory_get_control_list ()))
        return TRUE;

    bonobo_object_unref (BONOBO_OBJECT (summary_factory));
    bonobo_object_unref (BONOBO_OBJECT (component_factory));
    g_hash_table_foreach (storages_hash, free_storage, NULL);
    g_hash_table_destroy (storages_hash);

    gtk_main_quit ();

    return FALSE;
}   

static void
owner_unset_cb (EvolutionShellComponent *shell_component, gpointer user_data)
{
    unref_standard_folders ();
    mail_importer_uninit ();
    
    g_idle_add_full (G_PRIORITY_LOW, idle_quit, NULL, NULL);
}

static void
debug_cb (EvolutionShellComponent *shell_component, gpointer user_data)
{
    extern gboolean camel_verbose_debug;

    camel_verbose_debug = 1;
}

static const EvolutionShellComponentFolderType folder_types[] = {
    { "mail", "evolution-inbox.png" },
    { "mailstorage", "evolution-inbox.png" },
    { "vtrash", "evolution-trash.png" },
    { NULL, NULL }
};

static BonoboObject *
component_fn (BonoboGenericFactory *factory, void *closure)
{
    EvolutionShellComponent *shell_component;
    MailOfflineHandler *offline_handler;

    shell_component = evolution_shell_component_new (folder_types,
                             create_view,
                             create_folder,
                             NULL, /* remove_folder_fn */
                             NULL, /* xfer_folder_fn */
                             NULL, /* populate_folder_context_menu_fn */
                             NULL, /* get_dnd_selection_fn */
                             NULL);

    gtk_signal_connect (GTK_OBJECT (shell_component), "owner_set",
                GTK_SIGNAL_FUNC (owner_set_cb), NULL);
    gtk_signal_connect (GTK_OBJECT (shell_component), "owner_unset",
                GTK_SIGNAL_FUNC (owner_unset_cb), NULL);
    gtk_signal_connect (GTK_OBJECT (shell_component), "debug",
                GTK_SIGNAL_FUNC (debug_cb), NULL);
    gtk_signal_connect (GTK_OBJECT (shell_component), "destroy",
                GTK_SIGNAL_FUNC (owner_unset_cb), NULL);

    offline_handler = mail_offline_handler_new ();
    bonobo_object_add_interface (BONOBO_OBJECT (shell_component), BONOBO_OBJECT (offline_handler));

    return BONOBO_OBJECT (shell_component);
}

static BonoboObject *
summary_fn (BonoboGenericFactory *factory, void *closure)
{
    return executive_summary_component_factory_new (create_summary_view, 
                            NULL);
}

void
component_factory_init (void)
{
    component_factory = bonobo_generic_factory_new (COMPONENT_FACTORY_ID,
                            component_fn, NULL);
    summary_factory = bonobo_generic_factory_new (SUMMARY_FACTORY_ID,
                              summary_fn, NULL);

    evolution_mail_config_factory_init ();

    if (component_factory == NULL || summary_factory == NULL) {
        e_notice (NULL, GNOME_MESSAGE_BOX_ERROR,
              _("Cannot initialize Evolution's mail component."));
        exit (1);
    }
}

static int
storage_create_folder (EvolutionStorage *storage, const char *path,
               const char *type, const char *description,
               const char *parent_physical_uri, gpointer user_data)
{
    CamelStore *store = user_data;
    char *name;
    CamelURL *url;
    CamelException ex;
    CamelFolderInfo *fi;

    if (strcmp (type, "mail") != 0)
        return EVOLUTION_STORAGE_ERROR_UNSUPPORTED_TYPE;
    name = strrchr (path, '/');
    if (!name++)
        return EVOLUTION_STORAGE_ERROR_INVALID_URI;

    camel_exception_init (&ex);
    if (*parent_physical_uri) {
        url = camel_url_new (parent_physical_uri, NULL);
        if (!url)
            return EVOLUTION_STORAGE_ERROR_INVALID_URI;

        fi = camel_store_create_folder (store, url->path + 1, name, &ex);
        camel_url_free (url);
    } else
        fi = camel_store_create_folder (store, NULL, name, &ex);

    if (camel_exception_is_set (&ex)) {
        /* FIXME: do better than this */
        camel_exception_clear (&ex);
        return EVOLUTION_STORAGE_ERROR_INVALID_URI;
    }

    if (camel_store_supports_subscriptions (store))
        camel_store_subscribe_folder (store, fi->full_name, NULL);
    
    folder_created (store, fi);
    
    camel_store_free_folder_info (store, fi);
    
    return EVOLUTION_STORAGE_OK;
}

static void
add_storage (const char *name, const char *uri, CamelService *store,
         GNOME_Evolution_Shell corba_shell, CamelException *ex)
{
    EvolutionStorage *storage;
    EvolutionStorageResult res;
    
    storage = evolution_storage_new (name, uri, "mailstorage");
    gtk_signal_connect (GTK_OBJECT (storage), "create_folder",
                GTK_SIGNAL_FUNC (storage_create_folder),
                store);
    
    res = evolution_storage_register_on_shell (storage, corba_shell);
    
    switch (res) {
    case EVOLUTION_STORAGE_OK:
        mail_hash_storage (store, storage);
        mail_scan_subfolders (CAMEL_STORE (store), storage);
        /* falllll */
    case EVOLUTION_STORAGE_ERROR_ALREADYREGISTERED:
    case EVOLUTION_STORAGE_ERROR_EXISTS:
        return;
    default:
        camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
                     _("Cannot register storage with shell"));
        break;
    }
}


/* FIXME: 'is_account_data' is an ugly hack, if we remove support for NNTP we can take it out -- fejj */
void
mail_load_storages (GNOME_Evolution_Shell shell, const GSList *sources, gboolean is_account_data)
{
    CamelException ex;
    const GSList *iter;
    
    camel_exception_init (&ex);

    /* Load each service (don't connect!). Check its provider and
     * see if this belongs in the shell's folder list. If so, add
     * it.
     */

    for (iter = sources; iter; iter = iter->next) {
        const MailConfigAccount *account = NULL;
        const MailConfigService *service = NULL;
        CamelService *store;
        CamelProvider *prov;
        char *name;

        if (is_account_data) {
            account = iter->data;
            service = account->source;
        } else {
            service = iter->data;
        }
        
        if (service->url == NULL || service->url[0] == '\0')
            continue;

        prov = camel_session_get_provider (session, service->url, &ex);
        if (prov == NULL) {
            /* FIXME: real error dialog */
            g_warning ("couldn't get service %s: %s\n", service->url,
                   camel_exception_get_description (&ex));
            camel_exception_clear (&ex);
            continue;
        }

        /* FIXME: this case is ambiguous for things like the
         * mbox provider, which can really be a spool
         * (/var/spool/mail/user) or a storage (~/mail/, eg).
         * That issue can't be resolved on the provider level
         * -- it's a per-URL problem.
         */
        if (!(prov->flags & CAMEL_PROVIDER_IS_STORAGE) ||
            !(prov->flags & CAMEL_PROVIDER_IS_REMOTE))
            continue;

        store = camel_session_get_service (session, service->url,
                           CAMEL_PROVIDER_STORE, &ex);
        if (store == NULL) {
            /* FIXME: real error dialog */
            g_warning ("couldn't get service %s: %s\n", service->url,
                   camel_exception_get_description (&ex));
            camel_exception_clear (&ex);
            continue;
        }

        if (is_account_data)
            name = g_strdup (account->name);
        else
            name = camel_service_get_name (store, TRUE);

        add_storage (name, service->url, store, shell, &ex);
        g_free (name);

        if (camel_exception_is_set (&ex)) {
            /* FIXME: real error dialog */
            g_warning ("Cannot load storage: %s",
                   camel_exception_get_description (&ex));
            camel_exception_clear (&ex);
        }
        
        camel_object_unref (CAMEL_OBJECT (store));
    }
}

void
mail_hash_storage (CamelService *store, EvolutionStorage *storage)
{
    camel_object_ref (CAMEL_OBJECT (store));
    g_hash_table_insert (storages_hash, store, storage);
}

EvolutionStorage*
mail_lookup_storage (CamelStore *store)
{
    EvolutionStorage *storage;

    /* Because the storages_hash holds a reference to each store
     * used as a key in it, none of them will ever be gc'ed, meaning
     * any call to camel_session_get_{service,store} with the same
     * URL will always return the same object. So this works.
     */

    storage = g_hash_table_lookup (storages_hash, store);
    if (storage)
        gtk_object_ref (GTK_OBJECT (storage));

    return storage;
}

int
mail_storages_count (void)
{
    return g_hash_table_size (storages_hash);
}

void
mail_storages_foreach (GHFunc func, gpointer data)
{
    g_hash_table_foreach (storages_hash, func, data);
}